Vacuum tube



im w24, mgm@ W. G. HOUSKEEPER VACUUM TUBE Filed April 15 1921 Eaented dan. 3, 124.

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STATES.

rarer 'WILLIAM G. HOUSKEEPER, OF NEW YORK, N. Y., ASSIGNOR TO WESTERN ELECTRIC COMPANY, INCORPORATW, OF NEW YORK, N. Y., A CORPORATION' QF NEW YORK.

VACUUM TUBE.

Application led April 15, 1921. Serial No. 461327.

To aZZ 'whom t may concern.'

Be it known that l, WILLIAM G. Hous- KEEPER, a citizen of the United States, residing at New -York city, in the county of e New York, State of New York, have iiivented certain new and useful improvements in Vacuum rlubes, of which the following is a full, clear, concise, and exact descri tion. 4

is invention relates to a suspension device and has particular reference to a device for supporting an electrode of a vacuum tube.

The object of this invention is to provide w a resilient electrode supporting element of a simple design and so constructed as to permit ready adjustment of the electrode during assembly of the tube and the constant maintenance thereafter of said elecf trode under uniform tension. y

This object is attained by providing a resilient member adapted to engage a member rigidly supported within the tube and providing in combination with said resilient member a portion to embrace and firmly grip a suspension element. The electrode to be supported is engaged with the suspension element and the resilient portion maintains the electrode under uniform ten- 3@ sion.

This invention will be better understood by having reference to the following specification and the accompanying drawing wherein Fig. 1 is a side view partially broken away of a vacuum tube embodying the invention and Fig. 2 is an enlarged detail of the suspension device.

A vacuum tube 1 is provided with a reentrant stem 2 on which is arranged a cols@ lar 3 having arms 4 extending therefrom into the interior of the tube. Carried by the inner ends of the arms 4 is a substantially cylindrical anode 5 to which are welded rods 6. Carried by the ends of the d@ rods 6 are the lower and upper lavite blocks 7 and 8 between which is arranged the grid electrode 9. Extending upwardly from the lower block 7 and ri idl mounted therein are the hooks 10. n t e upper block 8 are provided apertures 11, the upper part of which are countersunk as at 12. Arranged in each countersunk portion 12 is a resilient support which comprises a loosely wound wire helix 13 of a diameter approximately the same as that of the countersunk socket 12. Integral with the helix 13 is a closely wound wire helix 14 of considerably smaller diameter than the helix 13. The shank of the hook 15 extends through the aperture 11 and the helices 13 and 14, the helix 14 closely embracing the shank. That portion of the shank arranged within the helix 14 and the helix itself are crimped to provide a tight connection between them. The cathode 16 is strung between the hooks 10 and 15 and is maintained under uniform tension by means of the springs 13.

In the assembling of this structure, the

hooks 15 are engaged with the upper loops of thefcathode 16 and the suspension members are arranged with the helices 14 embracing the Shanks thereof. The hooks are pulled up until the cathode is taut; the springs 13 are then compressed after which the helices 14 and the hook shanks are crimped together. An desired tension may be obtained on the cat ode by crimping the helices 14 to the hook shanks at the proper places.

Since the helices 13 are Seated in the sockets 12 the suspension members are maintained coaxial with the Shanks of the hooks .15 and the possibility of the Shanks binding in the apertures 11 is eliminated. Also the full force of the spring is effective in keeping the cathode under tension.

What is claimed is:

1. In combination, a suspension element and a support therefor comprising a resilient portion and a portion embracing said` suspension element, said embracing portion and suspension element being crimped t0- gether.

2. In combination, a suspension element and a support therefor comprising ahelical spring portion and a kportion embracing said suspension element, said embracing portion and said suspension element being crimped together.

3. In combination, a suspension element and a support therefor comprising a helical resilient portion and a portion embracing said suspension element, said embracin portion being rigidly connected with sai sus pension element.

4. In combination, a suspension element and a supporttherefor comprising a loosely wound wire helix, and a closely wound wire helix integral therewith, saidclosely wound helix emhracing said suspension 'element and heine` rigidly joined thereto.

5. A suspension device comprising a large diameter loosely wound wire helix, a small diameter closely wound wire helix integral therewith and a' suspension element em braced by said smaller diameter helix and rigidi attached thereto.

6. suspension device comprising a large diameter loosely wound wire helix, a small diameter closelv wound wire helix integral therewith and a suspension element supported hy said smaller diameter helix. n

7. A suspension device comprising a large diameter loosely wound wire helix, a small diameter closely wound Wire helix integral therewith and a suspension element passing through said helices and supported'by said small diameter helix.

8. A. suspension device comprising a large diameter loosely wound wire helix, a small diameter closely Wound wire helix integral therewith and a suspension element passing through said helices and rigidly attached to said small helix.

9. A suspension device comprising a large4 diameter loosely wound wire helix, a small diameter closely wound wire helix integral therewith, a suspension element passing through said helices, said small diameter helix and said suspension element being crimped together.

l0. ln combination, a suspension element and a support therefor comprising a resilient portion surrounding said suspension element and a portion embracing said suspension element, said embracing portion and said suspension element being crimped together.

11. ln a vacu tube, a plate having an aperture therethrough, a suspension element slidablyy arranged in said aperture, a suport therefor comprising a resilient portion 1n contact with said plate, and a portion embracing and gripping said suspension neeaeoe element, said resilient portion heing main tained against lateral movement."

l2.. lin a 'vacuum tubepa plat/e havingu an aperture therethrough, a' suspension device comprising a large diameter oosely wound wire helix in contactA with said plate, a small diameter clely wound wire helix integral therewith, a suspension element slidably a ranged in said aperture, said suspension element being rmly embraced by said small diameter helix, and means for preventing lateral movement ci said large diameter helix.

13. ln a vacuum tube, a plate having a countersunk aperture therethrough, a large diameter loosely wound wire helix arranged in said countersunlr portion, a small diam-= eter closely wound wire helix integral with said hrst helix. and a suspension element slidably arranged lin said aperture, said suspension element and said small diameter helix being crimped together.

ll. ln a vacuum tuhe, a plate having an aperture therethrough, a suspension element slidably arranged in said aperture, an electrode supported by said suspension element, a support for said suspension element comprismg a large diameter yloosely wound wire helix, a closely wound small diameter wire helix integral therewith, both of said helices surrounding said sus ension element, the larger diameter helix eing in contact with said plate and the suspension element and small diameter helix being crimped together. .fz 

